CN102022679A - Light emitting diode (LED) streetlamp realizing heat loss through self-convection - Google Patents
Light emitting diode (LED) streetlamp realizing heat loss through self-convection Download PDFInfo
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- CN102022679A CN102022679A CN2010105831022A CN201010583102A CN102022679A CN 102022679 A CN102022679 A CN 102022679A CN 2010105831022 A CN2010105831022 A CN 2010105831022A CN 201010583102 A CN201010583102 A CN 201010583102A CN 102022679 A CN102022679 A CN 102022679A
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Abstract
The invention discloses a light emitting diode (LED) streetlamp realizing heat loss through self-convection, which comprises an LED streetlamp body and a lamppost part of the LED streetlamp. A modular radiation system is arranged in the lamp body. The lamppost part comprises a streetlamp bracket mainly functioning in supporting and a convection channel formed by utilizing the hollow structure of the lamppost. One end of the channel is communicated with the lamp body. A first convection hole a certain distance away from the ground is formed below the channel. A fan driven by cold air is arranged in the channel. The lamp body is a hollow shell. Second convection holes for forming the self-convection are formed on the lateral surface of the hollow shell, and are communicated with a cavity of the shell. In the LED streetlamp, the self-convection is formed in the lamp by utilizing heat produced by the LED lamp, namely, the heat, originally carried away by natural wind, produced by an LED chip is utilized to drive the cold air below to form convection, so the radiation efficiency of the lamp is improved.
Description
Technical field
The present invention relates to a kind of LED street lamp, particularly a kind of LED street lamp that utilizes produces the street lamp that heat forms heat loss through convection from body.
Background technology
The LED light fixture can produce heat when normal the use, if the light fixture heat radiation is bad, heat accumulation can cause serious injury the LED lamp life, and the environment for use of street lamp is more abominable, safeguard inconvenience, if street lamp damages then is easy to pedestrian and traffic safety are threatened.
The heat of LED street lamp is mainly derived from led chip, and the basic structure of led chip is a PN junction, when the electric current of over commutation injects PN junction, electronics in the electric current and hole after the PN junction district is compound, outside radiation photon, photon excitated fluorescent powder again is luminous.But in compound, also there is the right mode that combines with heat energy in most electronics and hole to show.Except electronics and hole-recombination generation heat, there are resistance in the electrode itself and backing material or the conductive silver paste etc. that form during owing to encapsulation, also can produce Joule heat during the electric current injection, cause the rising of the temperature of led chip.Led chip material and surrounding medium have refringence in addition, and the very big part photon that chip internal produces can't overflow smoothly, repeatedly reflects at chip internal, and is absorbed by chip, and these energy also can change into heat.
At present, the more scabrous problem of LED light fixture is the light decay problem, cause the reason of LED light decay that chip, fluorescent material are arranged, also have the reason of encapsulation technology aspect, the heat that chip produces when operate as normal can not in time distribute, heat accumulation will be accelerated the aging speed of fluorescent material, forms light decay.According to the speed of chemical reaction, every rising 10 degree of reaction temperature, reaction speed doubles, and the luminous principle of LED is the photon of PN junction radiation, and excitated fluorescent powder is luminous.Temperature raises, and also quickens the aging of fluorescent material, the life-span of reducing the LED light fixture.
Original LED road lamp cooling technology, being generally at the back side of LED light fixture increases fin or adopts the mode of radiator fan to dispel the heat.The radiating mode of built-in fans wherein attracts dust easily, influences the heat radiation of street lamp, and itself needs current drives in addition, in case fan breaks down, will damage because heat radiation is bad at light fixture so.
It as application number 200710151022.8 patent, it also is one from convection type LED street lamp, its air admission hole is below lamp stand, this structure can influence the steadiness of light fixture, in addition, the top of lamp stand is not used for helical form fin that cold air is broken up, after cold air is entered, just directly the orifice flow to the top goes, and the effect of heat radiation is also not obvious.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of LED of utilization street lamp and produce the street lamp that heat forms heat loss through convection from body, the heat that utilizes the LED street lamp to produce, the cold air that drives the below rises, in lamp body, form convection current, the heat of LED light fixture is distributed,, reduce the light fixture use cost to improve the radiating efficiency of light fixture.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of utilization from body produces the LED street lamp that heat forms heat loss through convection, the lamp stand part that comprises LED road lamp body and LED street lamp, wherein be provided with cooling system in the lamp body, it is characterized in that the convection channel that lamp stand partly comprises the street lamp bracket of main support effect and utilizes the hollow structure of lamp stand to form, one end of passage is communicated with lamp body, the passage below is provided with the first pair of discharge orifice that overhead has certain distance, be provided with the fan that utilizes cold air to promote in the passage, wherein, lamp body is a hollow housing, its side and below be provided with the some second pair of discharge orifices that are used to form from the body convection current, second pair of discharge orifice is communicated with the housing inner chamber, and the sectional area of second pair of discharge orifice is less than the sectional area of first pair of discharge orifice.
As the preferred embodiment of the present invention, described cooling system comprises thermal-arrest base plate, the heat pipe that is connected with the thermal-arrest base plate that is arranged in the lamp body and is connected with led light source and is arranged on radiating fin on the heat pipe.
Said fans can be installed in the entrance point of passage, also can be installed in the port of export of passage.
The distance on above-mentioned first pair of discharge orifice and ground is 50-80cm.
As improvement of the technical scheme of the present invention, the street lamp bracket that is positioned at first pair of discharge orifice place is provided with dust cover.
The invention has the beneficial effects as follows: the heat that the present invention utilizes LED light fixture itself to produce, form from the body convection current in lamp interior, belong to the led chip of originally taking away by natural wind send Btu utilization, the cold air that drives the below forms convection current, the radiating efficiency of raising light fixture; The present invention has following characteristics: rationally utilize the heat of led chip, improved rate of energy; Utilize the fan of helical form fin to make cold air form turbulent flow, cold air can improve radiating efficiency through more radiating fin; The split type lamp stand design of half makes the structure of street lamp firmer; The street lamp top is a sawtooth design, solves problems such as big, the poly-dirt of windage, ponding; The heat collector tube design, the thermal resistance of reduction LED, high rate heat transport alleviates the stress that the module LED chip is caused uneven in temperature in addition.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of one embodiment of the present invention;
Fig. 2 is a vertical view of the present invention;
Fig. 3 is the decomposing schematic representation of lamp body.
The specific embodiment
With reference to Fig. 1, Fig. 2, a kind of utilization from body disclosed by the invention produces the LED street lamp that heat forms heat loss through convection, the lamp stand part that comprises LED road lamp body 1 and LED street lamp, wherein be provided with cooling system in the lamp body 1, light source light management system and electricity system, lamp stand partly comprises the street lamp bracket 2 of main support effect and utilizes the convection channel 3 of the hollow structure formation of lamp stand, one end of passage 3 is communicated with lamp body, passage 3 belows are provided with overhead first pair of discharge orifice 4 of 50-80cm, the street lamp bracket that is positioned at first pair of discharge orifice 4 place is provided with the dust cover (not shown), can prevent that by dust cover dust in air and foreign material from entering in the lamp body 1.
Be provided with the fan 5 that utilizes cold air to promote in the passage 3, this fan 5 can be the fan with helical form fin, and fan 5 can be installed in the entrance point of passage 3, also can be installed in the port of export of passage 3.
Lamp body 1 is a hollow housing, be provided with 6, the second pairs of discharge orifices 6 of second pair of discharge orifice that are used to form from the body convection current in its side and be communicated with the housing inner chamber, and the sectional area of second pair of discharge orifice 6 is less than the sectional area of first pair of discharge orifice 4.The LED light fixture that adopts full bag design to protect on the top of light fixture to rain at outdoor environment not wind-engaging, dirt,, influence such as foreign material, lamp body inside has only lamp stand and light fixture junction and to discharge orifice and external communications.
In the present embodiment, cooling system comprises thermal-arrest base plate 7, the heat pipe 8 that is connected with the thermal-arrest base plate that is arranged in the lamp body and is connected with led light source and is arranged on radiating fin 9 on the heat pipe.Certainly, cooling system also can adopt other version of this area, is not described further at this.
Principle of the present invention:
The back of led module is provided with the thermal-arrest plate, and there is heat pipe close-connected with it thermal-arrest plate back, has and its some fins that closely link to each other at the other end of heat pipe, is provided with between the fin to be used for the gap that air flows.
Led module under the situation of operate as normal, heat assemble at thermal-arrest plate place and by with the other end of the close-connected heat pipe high speed transfer of thermal-arrest plate to heat pipe, the other end of heat pipe again heat fast conduction give radiating fin.In lamp body inside, the fin temperature raises, fin will be the air heat in the lamp body so, make the air in the chamber become hot-air, hot-air constantly is heated and expands and lightens, owing to be subjected to the restriction of lamp body internal volume, the air that expands can only be from predetermined discharging discharge orifice, simultaneously lighter hot-air rises, and brings the pressure of a rising, and this tries hard to recommend also discharge orifice is discharged from lamp body of the moving air that is heated.After hot-air is discharged, a negative pressure P has appearred in lamp body inside, formula F=P * S according to power, wherein S is the sectional area of lamp stand below to discharge orifice, this pressure is given power F who makes progress of cold air of below, this cold air of trying hard to recommend moving lamp stand bottom rises, the fin rotation that cold air rises in lamp stand and promotes fan, under the situation that fan rotates, cold air becomes the uniform cold airflow of acceleration, and like this, cold air just can pass through more radiating fin uniformly, by the convection current of cold and hot air and the heat exchange of cold air and fin the heat on the fin is taken away, after cold air is heated at last from discharge orifice is discharged.
Because fin is constantly passed to cold air to heat, hot-air constantly rises and drives lamp stand below cold air and replenish, and slowly forms a balance.
According to the formula of flow, Q=v * S, wherein, Q is a flow, and v is a flow velocity, and S is a sectional area.
After cold and hot convection current formed, bigger at the inlet S1 at street lamp post place so flow is a certain value owing to form a balance, and less to discharge orifice sectional area S2 near the radiator place, under the certain situation of flow, sectional area was more little, and flow velocity is big more.So the flow velocity to discharge orifice of close radiating fin is relatively large, can effectively improve the radiating efficiency of light fixture.
Claims (7)
1. a utilization produces the LED street lamp that heat forms heat loss through convection from body, the lamp stand part that comprises LED road lamp body and LED street lamp, wherein be provided with cooling system in the lamp body, it is characterized in that the convection channel that lamp stand partly comprises the street lamp bracket of main support effect and utilizes the hollow structure of lamp stand to form, one end of passage is communicated with lamp body, the passage below is provided with the first pair of discharge orifice that overhead has certain distance, be provided with the fan that utilizes cold air to promote in the passage, wherein, lamp body is a hollow housing, its side and below be provided with the second pair of discharge orifice that is used to form from the body convection current, second pair of discharge orifice is communicated with the housing inner chamber.
2. a kind of the utilization from body according to claim 1 produces the LED street lamp that heat forms heat loss through convection, it is characterized in that described cooling system comprises to be arranged in the lamp body and the thermal-arrest base plate, the heat pipe that is connected with the thermal-arrest base plate that are connected with led light source and be arranged on radiating fin on the heat pipe.
3. a kind of the utilization from body according to claim 1 produces the LED street lamp that heat forms heat loss through convection, it is characterized in that described fan is installed in the entrance point of passage.
4. a kind of the utilization from body according to claim 1 produces the LED street lamp that heat forms heat loss through convection, it is characterized in that described fan is installed in the port of export of passage.
5. produce the LED street lamp that heat forms heat loss through convection according to claim 1,2,3 or 4 described a kind of utilizations, it is characterized in that the distance on described first pair of discharge orifice and ground is 50-80cm from body.
6. produce the LED street lamp that heat forms heat loss through convection according to claim 1,2,3 or 4 described a kind of utilizations, it is characterized in that first pair of discharge orifice place is provided with dust cover from body.
7. a kind of the utilization from body according to claim 5 produces the LED street lamp that heat forms heat loss through convection, it is characterized in that the street lamp bracket that is positioned at first pair of discharge orifice place is provided with dust cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105831022A CN102022679A (en) | 2010-12-11 | 2010-12-11 | Light emitting diode (LED) streetlamp realizing heat loss through self-convection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105831022A CN102022679A (en) | 2010-12-11 | 2010-12-11 | Light emitting diode (LED) streetlamp realizing heat loss through self-convection |
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| CN102022679A true CN102022679A (en) | 2011-04-20 |
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| CN2010105831022A Pending CN102022679A (en) | 2010-12-11 | 2010-12-11 | Light emitting diode (LED) streetlamp realizing heat loss through self-convection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221172A (en) * | 2011-05-24 | 2011-10-19 | 祁守美 | Streetlamp capable of radiating heat |
| CN102338335A (en) * | 2011-09-20 | 2012-02-01 | 惠州雷士光电科技有限公司 | Light-emitting diode (LED) street lamp |
| CN110762430A (en) * | 2019-11-07 | 2020-02-07 | 黄荆 | Multifunctional street lamp based on decomposition reaction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457885A (en) * | 2007-12-14 | 2009-06-17 | 天津市数通科技有限公司 | Concentrated high brightness LED street lamp with self-convection heat radiation body |
| CN201363698Y (en) * | 2009-01-07 | 2009-12-16 | 钱春华 | High power LED street lamp radiation device |
| CN101776236A (en) * | 2010-02-28 | 2010-07-14 | 东莞市万丰纳米材料有限公司 | LED street lamp |
| CN201615454U (en) * | 2010-04-07 | 2010-10-27 | 武威 | Cooling lamp post of air duct type lighting lamp |
| CN101881404A (en) * | 2010-07-01 | 2010-11-10 | 王干 | Intelligently controlled forced convection radiation LED streetlamp system |
-
2010
- 2010-12-11 CN CN2010105831022A patent/CN102022679A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457885A (en) * | 2007-12-14 | 2009-06-17 | 天津市数通科技有限公司 | Concentrated high brightness LED street lamp with self-convection heat radiation body |
| CN201363698Y (en) * | 2009-01-07 | 2009-12-16 | 钱春华 | High power LED street lamp radiation device |
| CN101776236A (en) * | 2010-02-28 | 2010-07-14 | 东莞市万丰纳米材料有限公司 | LED street lamp |
| CN201615454U (en) * | 2010-04-07 | 2010-10-27 | 武威 | Cooling lamp post of air duct type lighting lamp |
| CN101881404A (en) * | 2010-07-01 | 2010-11-10 | 王干 | Intelligently controlled forced convection radiation LED streetlamp system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221172A (en) * | 2011-05-24 | 2011-10-19 | 祁守美 | Streetlamp capable of radiating heat |
| CN102338335A (en) * | 2011-09-20 | 2012-02-01 | 惠州雷士光电科技有限公司 | Light-emitting diode (LED) street lamp |
| CN110762430A (en) * | 2019-11-07 | 2020-02-07 | 黄荆 | Multifunctional street lamp based on decomposition reaction |
| CN110762430B (en) * | 2019-11-07 | 2021-07-13 | 江苏轩朗照明电器有限公司 | Multifunctional street lamp based on decomposition reaction |
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Application publication date: 20110420 |